In part 2 of this article, we are going to create a data driven web service that will return JSON and XML to the client, and then use jQuery to add a new item to the database and display it in our page.
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Here’s a quick guide to creating a RESTful web service with Glassfish using JAX-RS.
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(updated : This post refers to Glassfish installations prior to version 3.0.1 which was recently released and includes Weld version 3.0.1. Given the new version, this manual update is not necessary and should not be performed if you have an updated installation of Glassfish 3.0.1+)
Even some of the recent versions of Glassfish include a version of Weld, the reference implementation for CDI (JSR 299), that has some major issues. Since Glassfish uses OSGI, upgrading isn’t as easy as just replacing the jar with a new one. This tutorial shows you how to upgrade Glassfish to Weld 1.0.1.Final as well as including a pre-built distribution of the two files that need re-deploying.
One of the ways to get around the faulty version of Weld currently in Glassfish is to moving up to Glassfish 3.0.1 nightly builds (update : 3.0.1 has been released and should be used) . A less bleeding edge solution would be to upgrade the version of Weld that is deployed on your current version of Glassfish by updating the
weld-osgi-bundle jar files. However, one must be careful of the integration jar version as one of the major interfaces changed after the initial release of Weld introducing incompatibilities.
Updating the OSGI bundle is easy since it can be built from the Weld source code. Just download and compile it and locate the osgi-bundle.jar file.
We also need to grab a new version of the
weld-integration.jar file. There are all sorts of versions of this file, but the one I found working for Weld 1.0.1.final was version 3.0.1-b11/.
I’ve already built the osgi-bundle and grabbed the integration jar and verified that they work so I’ve renamed and zipped them so you can just download and unzip them into the
modules directory of your Glassfish v3 installation.
This is also a necessary step to get the Knappsack Java EE 6 demo project working under Glassfish. You can find more details on the server compatability page
Like Christmas come early, Sun announced the release of JEE 6. This release sees continued improvement in the JEE stack with the inclusion of JSR 299, Java Contexts and Dependency Injection (CDI), and EJB 3.1 as well as JSF 2.0, and JPA 2.0. JSF especially has seen changes as a result of practical user feedback and community add-ons such as Seam and JSF Ajax frameworks which have contributed back to the JCP.
Glassfish v3 which implements the full JEE 6 stack has also been released, with JBoss’ Weld as the CDI implementation. Netbeans 6.8 has also been released with full JEE 6 project support including maven support for enterprise applications. Also of note is the hot deploy function of Glassfish which can deploy your app while maintaining session information.
Personally, I’m pleased. JEE 6 has really improved things for the java standards, and CDI has filled some gaps that previously required different additional pieces to completely fill. The ghosts of EJB 2.1 should now be permanently laid to rest, but should serve as a stark reminder. Having good frameworks to build standards based solutions is always good for the community.
I’ll try and get some tutorials on developing with CDI and JSF 2.0 with Netbeans and Glassfish out soon.